Exit status 1, Error compiling for board Arduino/Genuino Uno. [Solved!]

Using Arduino Programming Questions
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When I compiled your code, I got:

SoftwareSerial\SoftwareSerial.cpp.o: In function __vector_3': C:\Users\PaulS\Documents\Arduino_160\hardware\arduino\avr\libraries\SoftwareSerial/SoftwareSerial.cpp:227: multiple definition of __vector_3'
GSM\GSM3SoftSerial.cpp.o:C:\Users\PaulS\Documents\Arduino_160\libraries\GSM\src/GSM3SoftSerial.cpp:499: first defined here

SoftwareSerial\SoftwareSerial.cpp.o: In function SoftwareSerial::read()': C:\Users\PaulS\Documents\Arduino_160\hardware\arduino\avr\libraries\SoftwareSerial/SoftwareSerial.cpp:392: multiple definition of __vector_4'
GSM\GSM3SoftSerial.cpp.o:C:\Users\PaulS\Documents\Arduino_160\libraries\GSM\src/GSM3SoftSerial.cpp:487: first defined here

SoftwareSerial\SoftwareSerial.cpp.o: In function SoftwareSerial::read()': C:\Users\PaulS\Documents\Arduino_160\hardware\arduino\avr\libraries\SoftwareSerial/SoftwareSerial.cpp:392: multiple definition of __vector_5'
GSM\GSM3SoftSerial.cpp.o:C:\Users\PaulS\Documents\Arduino_160\libraries\GSM\src/GSM3SoftSerial.cpp:487: first defined here
collect2.exe: error: ld returned 1 exit status
Error compiling.

You can NOT use SoftwareSerial and GSM at the same time.